Claiming a hindrance - A player who claims a hindrance must stop play as soon as possible.
Talking when ball is in play - Players should not talk during points. When talking interferes with an opponent’s ability to play a ball, it is a hindrance. For example, if a player hits a long lob and yells “go in” and the yell distracts an opponent who is about to hit the ball, then the opponent may claim the point based on a deliberate hindrance. If the opponent chooses to play the lob and misses it, the opponent loses the point because the opponent did not make a timely claim of hindrance. For example, if a player yells after an injury or getting stung by a bee, this is an unintentional hindrance that would entitle the opponent to claim a let.
Body movement - A player may feint with the body while a ball is in play. A player may change position at any time, including while the server is tossing a ball. Any other movement or any sound that is made solely to distract an opponent, including, but not limited to, waving arms or racket or stamping feet, is not allowed.
Let due to unintentional hindrance - A player who is hindered by an opponent’s unintentional act or by something else outside the player’s control is entitled to a let only if the player could have made the shot had the player not been hindered. A let is not authorized for a hindrance caused by something within a player’s control. For example, a request for a let because a player tripped over the player’s own hat should be denied.
Grunting - A player should avoid grunting and making other loud noises. Grunting and other loud noises may bother not only opponents but also players on adjacent courts. Grunting and the making of loud noises that affect the outcome of a point are hindrances.
Injury caused by player - When a player accidentally injures an opponent, the opponent suffers the consequences. Consider the situation where the server’s racket accidentally strikes the receiver and incapacitates the receiver. The receiver is unable to resume play within the time limit. Even though the server caused the injury, the server wins the match by retirement. On the other hand, when a player deliberately injures an opponent and affects the opponent’s ability to play, then the opponent wins the match by default. Hitting a ball or throwing a racket in anger is considered a deliberate act!
